const DBName = "EMI_SOCIAL";

let userProfileCache = {};

userDB = (DB) => {
    DB.profileCols = DB.db.db(DBName).collection("profiles");

    DB.newProfile = (profileObj) => {
        return DB.profileCols.insertOne(profileObj.toObj()).catch((err) => {
            console.log(err);
            return false;
        });
    }

    DB.getProfile = async (profileId) => {
        if (userProfileCache[profileId]) return userProfileCache[profileId];
        const _id = DB.ObjectID(profileId);
        let r = await DB.profileCols.findOne({ _id }).catch((err) => {
            console.log(err);
            return false;
        });
        if (r) userProfileCache[profileId] = r;
        return r;
    }

    DB.getProfiles = async (userId) => {
        const userid = DB.ObjectID(userId);
        return await DB.profileCols.find({ userid }).toArray().catch((err) => {
            console.log(err);
            return false;
        });
    }

    DB.latestProfile = async (userId) => {
        const userid = DB.ObjectID(userId);
        let r = await DB.profileCols.find({ userid })
                .sort({ lastUpdate: -1 }).limit(1)
                .toArray().catch((err) => {
            console.log(err);
            return false;
        });
        if (r[0]) userProfileCache[r[0].id] = r[0];
        return r[0];
    }


}

module.exports = userDB;